Design Optimization and Construction Control of Inclined Climbing Hanging Basket Structure for Cantilever Casting of the Arch Bridge's Arch Ring
To solve the problems of internal force and deformation control during the cantilever casting construction of inclined climbing hanging baskets for the arch bridge's arch ring,the Yashiqing Extra Large Bridge was taken as the research object.A numerical simulation method was utilized to calculate the internal forces,deformations,and stability of the hanging basket structure under three unfavorable working conditions.Based on the results,corresponding structural optimization and construction control measures were proposed.The results indicate that under working conditions 1 and 2,the maximum bending stress and maximum deformation of the inclined climbing hanging baskets are relatively close to the allowable limits,which is disadvantageous for controlling the deformation of the hanging basket itself and the arch ring.Therefore,three optimization schemes for the distribution beam design of inclined climbing baskets were proposed,and Scheme B(I32 I-beam of Q345)was the best.The proposed optimized design scheme and control measures(choosing a reasonable plan,strictly implementing construction preloading,strengthening construction monitoring,and controlling environmental factors)have played a crucial role in the inclined hanging basket construction,effectively ensuring the safety and stability of the hanging basket structure itself as well as during its operation.
arch ring of arch bridgecantilever castinginclined climbing hanging baskethanging basket structureconstruction control
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